JP6706926B2 - Fire alarm equipment - Google Patents

Description

The present invention relates to fire alarm equipment.

Generally, a fire alarm facility has a fire detector and a fire receiver connected to the fire detector. When a fire occurs, the fire detector outputs a fire signal to the fire receiver. When the fire receiver receives the fire signal, it fires itself to notify the fire and also activates the district sound, and further holds the fire signal and performs self-holding to maintain the state of the fire.

When the fire receiver reports a fire, the disaster prevention center staff assigned to the disaster prevention center, etc. go to check the area where the fire is detected, and if there is no fire, perform the work to restore the fire notification equipment. .. The fire alarm system is restored by operating the restoration switch provided on the fire receiver. That is, when the fire alarm system is restored, it is necessary to operate the personnel such as the disaster prevention center personnel.
(See Patent Document 1).

JP-A-5-274564

However, in small-scale facilities, the building manager may manage the fire alarm system, and the manager may not be resident. If the fire alarm system operates when the manager is absent, the fire alarm system cannot be restored, and the district sound will continue to ring until it is restored. Therefore, the manager sometimes turned off the power of the fire alarm facility when he was absent.

The present invention has been made to solve such a problem, and even when a fire alarm facility gives an alarm when a manager or the like is absent, it automatically recovers and stops the alarm when it is a false alarm. The purpose is to provide fire alarm equipment.

The present invention, in a fire alarm equipment comprising a fire detector that outputs a fire signal, and a fire receiver that is connected to the fire detector via a detector line and that receives a fire signal to notify a fire, The fire receiver is characterized in that it is determined to be a fire, and after a lapse of a predetermined time from the time when the fire is notified, it outputs a recovery signal for recovering the fire notification equipment and thereby recovers once.

Since the present invention temporarily restores the fire alarm facility after a predetermined time has elapsed from the time when the fire alarm alerts the fire, even if the alarm of the fire alarm facility is a false alarm, it is automatically recovered and the alarm is stopped. be able to.

It is a schematic diagram showing the whole fire alarm equipment 100 concerning Embodiment 1 concerning the present invention. It is the schematic which shows the whole fire alarm equipment 200 which concerns on Embodiment 2 which concerns on this invention. It is the schematic which shows the whole fire alarm equipment 300 which concerns on Embodiment 3 which concerns on this invention.

-Embodiment 1
<Structure of fire alarm system 100>
The configuration of the fire alarm facility 100 according to the first embodiment of the present invention will be described with reference to FIG.
The fire alarm system 100 according to the present invention includes a fire receiver 1, a detector line 2 connected to the fire receiver 1, and a plurality of fire detectors provided in the detector line 2 and connected to the fire receiver 1. It is a so-called P-type fire alarm facility that includes the container 3. There are one or more detector lines 2, and a plurality of fire detectors 3 are provided for each. In the present embodiment, the detector line 2 is three, that is, the fire alarm system 100 has three lines, but the number of lines is not limited thereto.

The fire detector 3 detects a physical quantity such as heat or smoke, detects a fire based on the physical quantity, and outputs a fire signal to the detector line 2. Here, the fire signal means that when the fire detector 3 detects a fire, the detector line 2 is short-circuited by a switching operation to maintain a low impedance state. The low impedance means that the impedance is low with respect to the impedance of the sensor line 2 in a state where no fire has occurred. The switching operation of the fire detector 3 is a so-called self-holding state in which the state of detecting a fire is maintained.

When the fire receiver 1 receives the fire signal output to the sensor line 2 and determines that there is a fire, the fire receiver 1 sounds itself by the main sound and also sounds a district sound (not shown) to notify the fire. Hereinafter, the ringing of the main sound and the district sound may be described as an alarm.

<Structure of fire receiver 1>
In the fire receiver 1, the detection circuit 11, the restoration circuit 14, the main acoustic circuit 12, and the district acoustic control circuit 13 are connected to the control circuit 15.

The detection circuit 11 is provided for each of the plurality of sensor lines 2 and is a circuit for monitoring a fire signal for each of the sensor lines 2. The detection circuit 11 receives the fire signal output from the fire detector 3 and outputs a signal indicating that the fire signal has been received to the control circuit 15. In the first embodiment, the detection circuit 11 is described as being provided for each sensor line 2, but not limited to this, a method of sequentially connecting to each sensor line may be used. In that case, a recovery circuit 14 described later is also sequentially connected to each sensor line.

When the detection circuit 11 receives the fire signal, the control circuit 15 outputs a ringing signal to the main acoustic circuit 12 and also outputs a ringing signal to the district acoustic control circuit 13. Further, the detection circuit 11 starts timing after receiving the fire signal, and after a lapse of a predetermined time, outputs a restoration command signal to the restoration circuit 14 connected to the sensor line 2 where the fire signal is output. The predetermined time is the time until the source of false information such as cigarette smoke and cooking smoke disappears, and is, for example, 5 minutes. In the following description, after the predetermined time has elapsed, it will be described as 5 minutes after the detection circuit 11 receives the fire signal (that is, the time when the detection circuit 11 determines that the fire is notified). It is not limited to 5 minutes.

The main sound circuit 12 is a circuit for sounding an alarm sound in the fire receiver 1 itself, and the district sound control circuit 13 is a circuit for controlling a district bell or the like for sounding a necessary alarm sound in each district. is there. The board surface of the fire receiver 1 is provided with a main sound stop switch and a district sound stop switch (not shown), and by pressing these switches, the main sound and the district sound can be stopped and released.

The restoration circuit 14 is provided for each sensor line 2, and is provided so as to be connected to the detection circuit 11 and the control circuit 15. When the restoration circuit 14 receives the restoration command signal output from the control circuit 15, the restoration circuit 14 outputs the restoration signal, releases the self-holding of the fire detector 3, and performs the restoration operation of stopping the fire signal. The recovery command signal output from the control circuit 15 is output by pressing a recovery switch (not shown) provided on the board surface of the fire receiver 1, and the detection circuit 11 outputs the fire signal as described above. It is also output after a predetermined time (5 minutes) has elapsed since the reception.
In the P-type fire alarm system 100, the recovery of the fire receiver 1 means that the fire signal held by itself is timed for 5 minutes after it is concluded that a fire has occurred, and then the self-held fire signal is deleted to display a sound or fire. The recovery of the fire detector 3 means that the recovery circuit 14 powers off the detector line 2 once to stop the operation of the circuit for continuing the output of the fire signal to stop the fire detector. The self-holding of 3 is released.

The fire receiver 1 also has a storage function. The operation of the storage function will be described in detail. First, after the fire receiver 1 receives the first fire signal, the restoration circuit 14 powers off the detector line 2 to release the self-holding of the fire detector 3. To do. Then, if there is an actual fire, the fire detector 3 outputs the second fire signal to the fire receiver 1, and the fire receiver 1 determines that there is a fire based on the second fire signal. That is, the fire receiver 1 has a function of determining a fire when the fire signal is received again within a predetermined accumulation time, for example, 1 minute after receiving the first fire signal output from the fire detector 3. It is a storage function.

<Explanation of manual recovery operation>
With reference to FIG. 1, an operation will be described in which a manager or the like confirms the fire site when the fire alarm facility 100 reports a fire, and manually restores the fire alarm facility 100 when there is a false alarm. That is, a so-called general method for recovering fire alarm equipment will be described.
When the fire alarm facility 100 gives an alarm, the manager or the like heads for the section where the sensor line 2 that outputs the fire signal is provided. Then, when the manager or the like goes to the site and confirms that there is no fire, he returns to the fire receiver 1 and starts the following recovery operation.

First, when other fire-fighting equipment (not shown) such as smoke prevention equipment that operates according to the interlocking signal output from the fire receiver 1 and emergency broadcast equipment that operates according to the transfer signal (not shown) is provided, After pressing the cut-off switch, the transfer cut-off switch, or the collective cut-off switch that cuts off both of them and cut off the interlocking signal and the transfer signal, other fire equipment is restored.

Then, after the recovery operation of the other fire fighting equipment is completed, the recovery switch is pushed by the fire receiver 1 to restore the fire alarm equipment 100, and then the interlock disconnection switch or the transfer disconnection switch is pressed again, and the interlocking signal or transfer signal is transmitted. Cancel the signal blocking. By these operations, the operation of restoring the fire alarm facility 100 is completed.

In the case of a general fire alarm facility, it cannot be recovered without performing the above-mentioned recovery operation. Therefore, for example, when there is no manager operating the fire receiver 1 The alarm sounds and continues without stopping.

<Operation explanation>
With reference to FIG. 1, the operation of the first embodiment in which the fire alarm facility 100 automatically recovers when the manager is absent will be described.
First, when the fire detector 3 outputs the first fire signal to the detector line 2, the fire receiver 1 receives the first fire signal at the detection circuit 11 connected to the detector line 2. When the detection circuit 11 receives the first fire signal, the control circuit 15 clocks a predetermined accumulation time of 1 minute, and the recovery circuit 14 releases the self-holding of the fire detector 3.

Next, when the second fire signal is received from the fire detector 3 during the predetermined accumulation time, the control circuit 15 outputs a ringing signal to the main acoustic circuit 12 and the district acoustic control circuit 13 to notify the fire. At the same time, the clocking of a predetermined time (5 minutes) is started, and a recovery command signal is output to the recovery circuit 14 after a lapse of the predetermined time of 5 minutes. Upon receiving the restoration command signal, the restoration circuit 14 outputs the restoration signal, cancels the self-holding of the fire detector 3 and the fire receiver 1, and stops the fire signal.

Finally, after the fire alarm facility 100 is restored once, the control circuit 15 stops the storage function of the fire receiver 1.
As a result, when the fire detector 3 outputs a fire signal due to cigarette smoke or the like, that is, when it is a false alarm, a recovery signal is output from the recovery circuit 14 five minutes after the detection circuit 11 receives the fire signal. Since it is output, the fire alarm system 100 will be automatically restored.

Similarly, when the fire detector 3 outputs a fire signal due to a real fire, the recovery circuit 14 outputs a recovery signal 5 minutes after the detection circuit 11 receives the fire signal. The fire alarm system 100 is once restored. However, since the storage function of the fire receiver 1 is stopped, the fire detector 3 immediately detects the fire again, and the fire signal is output again, so the fire alarm facility 100 restarts the alarm and continues. become.
Since the above-described operation is performed, even in the case of the fire alarm facility 100 installed in a building where a manager or the like is absent, it is possible to continue the alarm during a fire and stop the alarm during a false alarm to restore the alarm.

Even if the fire alarm facility 100 is restored once, the alarm may be continued without stopping for a certain period of time, specifically, a time required for the fire receiver 1 to judge again as a fire. . By doing so, even if the fire alarm facility 100 automatically recovers in the event of a fire, the alarm can be continued without interruption until the fire alarm facility 100 re-rings.

Further, although the invention according to the first embodiment of the present invention has been described as the fire receiver 1 having the storage function, the fire detector 3 may have the storage function. The fire detector 3 having a storage function outputs a fire signal when a fire is detected again within a predetermined storage time from the detection of the first fire. In this case as well, the fire alarm facility 100 is Once restored, the accumulation operation is stopped. By doing so, even if the fire alarm facility 100 is once restored at the time of a fire, it is possible to quickly give an alarm again. In addition, when the fire receiver 1 or the fire detector 3 has a storage function, it is preferable to stop the storage function after the fire alarm facility 100 has once spread, but even if the storage function does not stop, The effect of the invention can be obtained.

Further, when the fire signal is received from the plurality of sensor lines 2, the control circuit 15 does not have to output the restoration command signal even after a lapse of a predetermined time (5 minutes) from the notification of the fire. When a fire signal is output to a plurality of sensor lines 2, since there is a high probability of a fire, the alarm can be continued without automatic recovery. Similarly, in the case where a system capable of individually receiving fire signals from two different detectors on the same detector line 2 is provided, the reception of two fire signals can continue the alarm without recovery.

-Embodiment 2
With reference to FIG. 2, a fire alarm facility 200 according to Embodiment 2 of the present invention will be described. In the second embodiment, differences from the fire alarm facility 100 of the above-described first embodiment will be mainly described, and configurations corresponding to the first embodiment will be described with the same reference numerals. Omit it.

<Structure of fire alarm system 200>
The fire alarm facility 200 is connected to the fire receiver 1a, the detector line 2 connected to the fire receiver 1a, the relay device 5 provided in the detector line 2, and the fire receiver 1a via the relay device 5. It is a so-called P-type fire alarm facility including a plurality of fire detectors 3 that are operated.

<Structure of fire receiver 1a>
In the fire receiver 1a, the detection circuit 11a, the main acoustic circuit 12, and the district acoustic control circuit 13 are connected to the control circuit 15.
The detection circuit 11a is provided for each repeater 5 provided for each of the plurality of sensor lines 2 and monitors the fire signal for each detector line 2 via the repeater 5. The detection circuit 11a receives the fire signal output from the fire detector 3 via the repeater 5, and outputs a signal indicating that the fire signal has been received to the control circuit 15a.
When the detection circuit 11a receives the fire signal, the control circuit 15a outputs a ringing signal to the main acoustic circuit 12 and also outputs a ringing signal to the district acoustic control circuit 13.

<Structure of repeater 5>
The repeater 5 is installed for each of the plurality of sensor lines 2 so as to intervene in the sensor line 2. The repeater 5 includes a control circuit 21, a detection circuit 22, a recovery circuit 23, and an output circuit 24. It is connected.

The detection circuit 22 is a circuit that is connected to the sensor line 2 and monitors a fire signal for each sensor line 2. The detection circuit 22 receives the fire signal output from the fire detector 3 via the detector line 2 in the subsequent stage, and outputs a signal indicating that the fire signal has been received to the control circuit 21. In the detector line 2, the fire receiver 1a side is called a front stage, and the end side where a terminating resistor (not shown) is provided is called a rear stage.

When the detection circuit 22 receives the fire signal, the control circuit 21 causes the output circuit 24 to perform the switching operation to output the fire signal to the detection circuit 11a of the fire receiver 1a, and at the same time starts the timekeeping for a predetermined time (for example, After 5 minutes), a recovery command signal is output to the recovery circuit 23 connected to the sensor line 2 where the fire signal is output.

The restoration circuit 23 is provided so as to be connected to the detection circuit 22 and the control circuit 21. When the restoration circuit 23 receives the restoration command signal output from the control circuit 21, the restoration circuit 23 outputs the restoration signal, releases the self-holding of the fire detector 3, and performs the restoration operation of stopping the fire signal. Here, the restoration of the fire detector 3 means that the restoration circuit 23 once shuts off the detector line 2 to stop the operation of the circuit for continuing the output of the fire signal, and the self-holding is released. is there.
Further, the repeater 5 has a storage function, and it is judged as a fire when the fire signal is received again within a predetermined storage time after receiving the first fire signal output from the fire detector 3. ..

<Operation explanation>
The operation of the present embodiment in which the fire alarm facility 200 automatically recovers when the manager is absent will be described with reference to FIG.
First, when the fire detector 3 outputs the first fire signal to the detector line 2, the repeater 5 receives the first fire signal at the detection circuit 22 connected to the detector line 2 in the subsequent stage. When the detection circuit 22 receives the first fire signal, the control circuit 21 clocks a predetermined accumulation time (for example, 1 minute), and the recovery circuit 23 releases the self-holding of the fire detector 3.

Next, when the second fire signal is received from the fire detector 3 during the predetermined accumulation time, the control circuit 21 sends a fire detection signal to the output circuit 24 to activate it, and the switching operation of the output circuit 24. Fire signal is output to the detector line 2 in the previous stage. When the detection circuit 11a of the fire receiver 1a receives the fire signal output from the output circuit 24, the fire receiver 1a sounds a main sound or the like to notify the fire.

Further, the control circuit 21 outputs a fire signal from the output circuit 24, measures a predetermined time (5 minutes), and outputs a recovery command signal to the recovery circuit 23 after a lapse of the predetermined time of 5 minutes. Upon receiving the restoration command signal, the restoration circuit 23 outputs the restoration signal, releases the self-holding of the fire detector 3 and the fire receiver 1a, and stops the fire signal. This stops the alarm such as the main sound of the fire receiver 1a. It should be noted that the structure for recovering the fire receiver 1a by the recovery signal of the repeater 5 will not be described in detail, but for example, if a pressing means for pressing a recovery switch (not shown) of the fire receiver 1a by the recovery signal is provided. good. Alternatively, a signal line may be connected to an input/output detection circuit (not shown) of switches of the fire receiver 1a to generate a signal in the fire receiver 1a similar to that when the recovery switch is directly pressed.
Finally, after the fire alarm facility 200 is once restored, the control circuit 21 stops the storage function of the repeater 5. The storage function may be provided in the fire detector 3 instead of the repeater 5.

In this way, by providing the repeater 5 with the configuration for temporarily recovering the fire alarm facility 200, the fire receiver 1a that does not include the recovery circuit 14 and the control circuit 15 like the fire receiver 1 of the first embodiment. Also, by connecting the repeater 5, the fire alarm facility 200 can be temporarily restored after the fire alarm. That is, the fire alarm facility equipped with the existing fire receiver 1a can be renewed to the fire alarm facility 200 which is once restored without updating the fire alarm receiver.

-Embodiment 3
A fire alarm facility 300 according to Embodiment 3 of the present invention will be described with reference to FIG. In addition, in the third embodiment, differences from the fire alarm facility 100 of the above-described first embodiment will be mainly described, and the configurations corresponding to the first embodiment will be described with the same reference numerals. Omit it.

<Structure of fire alarm facility 300>
The configuration of the fire alarm facility 300 will be described with reference to FIG.
The fire alarm system 300 according to the present invention includes a fire receiver 1b, a repeater 6 connected via a transmission line 7, and a plurality of fire detectors 3 connected to the repeater 6 via a detector line 2. It is a so-called R-type fire alarm system equipped with. The transmission line 7 connected to the fire receiver 1b is common, and a repeater 6 required for each transmission line 7 is provided together with other terminal equipment (not shown). In this embodiment, the number of sensor lines 2 provided via the repeater 6 is three, but the number of sensor lines is not limited thereto.

The repeater 6 is connected to the fire detector 3 via the detector line 2 and is connected to the transmission circuit 16 of the fire receiver 1b via the transmission line 7. Then, the relay device 6 receives the fire signal output from the fire detector 3 to the detector line 2, and transmits a transmission signal indicating the fire signal to the fire receiver 1b via the transmission line 7.

<Structure of fire receiver 1b>
The configuration of the fire receiver 1b according to the third embodiment will be described with reference to FIG.
In the fire receiver 1b, the transmission circuit 16, the main acoustic circuit 12, and the district acoustic control circuit 13 are connected to the control circuit 15b.
One transmission circuit 16 is provided for each set of transmission lines 7, and is connected to the repeater 6 via the transmission line 7. A circuit for monitoring the fire signal output to each sensor line 2 via the repeater 6. The transmission circuit 16 receives the fire signal output from the fire detector 3 as a transmission signal via the relay device 6, and outputs a signal indicating that the transmission signal indicating the fire signal has been received to the control circuit 15b.

When the transmission circuit 16 receives the transmission signal indicating the fire signal, the control circuit 15b outputs a ringing signal to the main acoustic circuit 12 and also outputs a ringing signal to the district acoustic control circuit 13. In addition, the transmission circuit 16 starts timing after receiving the transmission signal indicating the fire signal via the repeater 6, and after a predetermined time (for example, 5 minutes) has elapsed, the fire receiver 1b is restored and the fire signal is transmitted. The recovery command signal is output to the repeater 6 connected to the sensor line 2 from which
Further, the fire receiver 1b has a storage function. The storage function may be provided not in the fire receiver 1b but in the fire detector 3 or in the repeater 6 as in the second embodiment.

<Structure of repeater 6>
In the repeater 6, the detection circuit 26, the recovery circuit 27, and the transmission circuit 29 are connected to the control circuit 25.
The detection circuit 26 is a circuit that is connected to each of a plurality of sensor lines 2 and monitors a fire signal for each of the sensor lines 2. The detection circuit 26 receives the fire signal output from the fire detector 3, and outputs a signal indicating that the fire signal has been received to the control circuit 25.

When the detection circuit 26 receives the fire signal, the control circuit 25 uses the transmission circuit 29 to output a transmission signal indicating the fire signal to the transmission circuit 16 of the fire receiver 1b.
The restoration circuit 27 is provided for each sensor line 2, and is provided so as to be connected to the detection circuit 26 and the control circuit 25. When the control circuit 25 receives the restoration command signal output from the transmission circuit 16 by the control circuit 15b of the fire receiver 1b, the restoration circuit 27 outputs the restoration signal, restores the fire detector 3, and stops the fire signal. Perform a recovery operation.

<Operation explanation>
With reference to FIG. 3, the operation of the present embodiment in which the fire alarm facility 300 automatically recovers when the manager is absent will be described.
When the fire detector 3 outputs a fire signal to the detector line 2, the repeater 6 receives the fire signal and outputs a transmission signal indicating the fire signal from the transmission circuit 29 to the transmission line 7. When the fire receiver 1b receives the second fire signal from the fire detector 3 through the relay device 6 during the predetermined accumulation time by the accumulation function, it determines that there is a fire and sounds the main sound or the like. In addition to reporting the fire, the control circuit 15b measures a predetermined time (5 minutes). Then, after a lapse of 5 minutes, which is a predetermined time, the fire receiver 1b once recovers itself to stop the ringing of the main sound and the like, and from the transmission circuit 16 to each terminal device (not shown) including the repeater 6. In response, a recovery command signal is output. Further, the control circuit 15b stops the storage function of the fire receiver 1b.

Upon receiving the restoration command signal, the repeater 6 outputs the restoration signal to the detector line 2 and the fire detector 3 is once restored. That is, the fire receiver 1b recovers itself, and the repeater 6 recovers the fire detector 3, so that the fire alarm facility 300 is once recovered.

As a result, the fire alarm facility 300 is automatically restored in the event of a false alarm, and during a fire, the fire alarm facility 300 is temporarily restored, but since the storage function of the fire receiver 1b is stopped, the fire detector is immediately activated. 3 detects the fire again, and the fire alarm facility 300 can restart and continue the alarm.
Since the above-described operation is performed, even in the case of the fire alarm facility 300 installed in a building where a manager or the like is absent, it is possible to continue the alarm in the event of a fire and stop the alarm in the case of a false alarm to recover.

As described above, according to the first to third embodiments of the present invention, the present invention has the following configurations.
(1) The present invention includes a fire detector that outputs a fire signal, and a fire receiver that is connected to the fire detector through a detector line and that receives the fire signal and notifies the fire. In the notification equipment, the fire receiver determines that the fire has occurred, and outputs a recovery signal for recovering the fire notification equipment after a lapse of a predetermined time from the time of notification of the fire, thereby temporarily recovering. Is.
(2) Further, in the present invention according to (1), the fire receiver includes a detection circuit that receives the fire signal, and a predetermined time after the detection circuit receives the fire signal and determines that there is a fire. It has a control circuit that outputs a recovery command signal, and a recovery circuit that receives the recovery command signal and outputs a recovery signal that temporarily recovers the fire receiver and the fire detector. ..
(3) Further, in the present invention according to (1) or (2), the fire detector having a storage function of outputting a fire signal when a fire is detected again within a predetermined time from the first detection of the fire, or The fire receiver is provided with a storage function that determines a fire when the fire signal is received again within a predetermined time after receiving the first fire signal, and the storage function temporarily restores the fire notification facility. After this, the accumulation operation is released.
(4) Further, in the present invention according to (2), in the fire alarm facility including a plurality of the sensor lines, the restoration circuit is connected to each of the sensor lines and once restored for each of the sensor lines. The fire receiver, when receiving the fire signal from the plurality of sensor lines, is characterized in that it does not output a recovery signal even after a lapse of a predetermined time from the notification of the fire. is there.
(5) Further, in the present invention according to any one of (1) to (4), the fire receiver outputs a recovery signal for recovering the fire alarm equipment after a predetermined time has elapsed since the fire alarm was notified by an alarm. After that, the alarm is continued for a certain period of time.
(6) Further, the present invention includes a fire detector that outputs a fire signal, and a fire receiver that is connected to the fire detector through a detector line and that receives the fire signal and notifies the fire. In the fire alarm equipment comprising, a relay is provided in the sensor line, the relay outputs the received fire signal to the fire receiver and measures a predetermined time, and after the predetermined time elapses, the fire alarm equipment is activated. It is characterized in that a restoration signal for restoration is outputted and the signal is once restored.
(7) Further, the present invention includes a fire detector that outputs a fire signal, and a fire receiver that is connected to the fire detector through a detector line and that receives the fire signal and notifies the fire. In the provided fire alarm equipment, a relay is provided in the detector line, the relay outputs the received fire signal to the fire receiver and measures a predetermined time, and after the predetermined time elapses, the fire detector is activated. The fire receiver outputs a restoration signal for restoration, and the fire receiver restores itself after a lapse of a predetermined time from the time when the fire signal is received and the fire is notified, and thereby the fire receiver is once restored. ..

1, 1a, 1b Fire receiver, 2 Detector line, 3 Fire detector, 5,6 Repeater, 7 Transmission line, 11, 11a Detection circuit, 12 Main acoustic circuit, 13 District acoustic control circuit, 14, 14a Restoration Circuit, 15, 15a, 15b control circuit, 16 transmission circuit, 21 control circuit, 22 detection circuit, 23 recovery circuit, 24 output circuit, 25 control circuit, 26 detection circuit, 27 recovery circuit, 29 transmission circuit, 100, 200, 300 Fire alarm system.

Claims (1)

A fire detector that outputs a fire signal, a fire receiver that is connected to the fire detector through a detector line and that receives the fire signal to notify a fire, and a fire alarm that includes a plurality of the detector lines In equipment,
The fire receiver includes a detection circuit that receives the fire signal, a control circuit that outputs a restoration command signal after a predetermined time has elapsed after the detection circuit receives the fire signal and determines that a fire has occurred, and the restoration command. And a recovery circuit for receiving a signal and outputting a recovery signal for temporarily recovering the fire receiver and the fire detector,
The restoration circuit is connected to each of the sensor lines and temporarily restores each of the sensor lines.
The fire receiver outputs the restoration command signal from the control circuit after a lapse of a predetermined time from the time when the fire is notified and the fire is notified, and the fire notification facility is once restored, and the plurality of sensor lines are connected. Fire alarm equipment, wherein when the fire signal is received from the fire alarm, the recovery signal is not output even after a lapse of a predetermined time from the notification of the fire.

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